To search for a program, type the name (case-insensitive) into the "program name" box, then click search. A list of programs should come up, assuming there are any in the database that match the name. The (number) after the author nickname is the user ID in my database, which brings us to the next part.
Underneath the regular search box, there is a user search box that can be used to show only programs made by a specific user. This user's ID can be obtained by searching for one of their programs, the ID will be the red number. The more programs they have in the database, the lower their ID will be. The regular search box can be used with the user search by simply pressing the user search button insead of the regular search button.
In the results list, program links are color-coded by their approximate age. Here is a guide:
Programs can be sorted using multiple buttons. Here is a guide:
The XSS option toggles whether HTML code in program titles should be executed or displayed. By default the code is simply displayed, as executing it would allow programs to mess with the CSS.